It seems my .m4a files can keep artwork, while .WAV can't? Has anyone else found the same?
To check the file type, Select a song track and Get Info > Summary tab.
I'm on a PC, Win 7.
Either the files have corrupt metadata (the internal file data describing the title, album, etc) or WAV just isn't support applying artwork?
But before you go permanently converting to another file format just for the artwork (WAV vs AAC vs Apple Lossless), I found this posting:
from:
kornchild2002
This Is Not
Join Date: Feb 2004
Location: Las Cruces
Posts: 10,389
Apple lossless can be safely used. Look up the term lossless, lossless means that no audio quality is lost. An Apple lossless file is a bit-for-bit identical file of the original CD yet it takes up less space (up to twice as less space) and it can handle ID tag information while WAV cannot. However, you should not
really use lossless or WAV for portable listening. It eats away at the battery and you can't store as many files. The reason is that WAV and Apple lossless take up more space and require more processing power. Hence you will not get the full 40 hours of audio playback time. You will get much less when using WAV (probably around 20) and about 25-30 hours with using Apple lossless.
You should always use a lossy format like mp3 or AAC for portable listening. Portable listening conditions just aren't good enough for you to hear the difference between a lossy and lossless file.
Outside noise has a lot to do with it and there are many other factors. For portable listening, I suggest using a maximum audio bitrate of around 256kbps but 160kbps-192kbps would probably be more than sufficient. Your headphones have a lot to do with it as well. You also need a portable headphone amp in order to start taking advantage of 320kbps+ audio.
Stick with a lossy audio format at 256kbps or below. I suggest downloading a program called foobar2000 and that you conduct a blind ABX test between a lossy 192kbps AAC/mp3 file and a WAV file using your headphones. Chances are high that you won't hear a credible difference between the two."